Four VOCALOID data was pre-implemented into Peace Walker. Through PlayStation Network or from downloads from Metal Gear Solid: The Unofficial Site, additional VOCALOID tracks could be obtained: * "HEAVENS DIVIDE (Verse A)" (first DLC package) * "HEAVENS DIVIDE (Chorus)" (second DLC package) * "KOI NO YOKUSHI-RYOKU (Intro)" (third DLC package) * "KOI NO YOKUSHI-RYOKU (Chorus)" (fourth DLC package) * "Calling to the Night" (fifth DLC package) * "View of Deep Snow" (sixth DLC package) * "MGS-PW" E3 Theme" (seventh DLC package) * "Outcry" (eighth DLC package) * "Secret Ambition (Intro)" * "Secret Ambition (Refrain)"